chemical compound formerly used in firefighting. A halon may be any of a group of organohalogen compounds containing bromine and fluorine and one or two carbons. The effectiveness of halons in extinguishing fires arises from their action in interrupting chain ... [2 Related Articles]
On March 1, 2000, Tarja Halonen was inaugurated as president of Finland, the first woman to have won that office. The candidate of the left-wing Social Democratic Party (SDP), she had defeated on February 6 former prime minister Esko Aho ... [5 Related Articles]
(from the article "drug") ...meperidine through inexpensive chemical substitutions. Experiments gave rise to a compound that caused chlorpromazine-like sedation but had a completely different structure. This led to the compound haloperidol, a more powerful antipsychotic with relatively fewer side effects.Tourette syndrome
(from the article "bacteria") Water is a fundamental requirement for life. Some bacteria prefer salty environments and are thus called halophiles. Extreme halophiles, such as Halobacterium, show optimum growth in conditions of 20 to 30 percent salt and will lyse (break ...
(from the article "Sahara") Saharan vegetation is generally sparse, with scattered concentrations of grasses, shrubs, and trees in the highlands, in oasis depressions, and along the wadis. Various halophytes (salt-tolerant plants) are found in saline depressions. Some heat- and drought-tolerant grasses, herbs, small shrubs, ...
(from the article "Saxifragales") Haloragaceae, or the water milfoil family, comprises 8 genera and 145 species of land, marsh, and water herbs with small leaves and small flower clusters. The flowers are unisexual, generally wind-pollinated, with a three- to four-chambered ovary and a similar ...
(from the article "annelid") ...(protrusible) proboscis cylindrical in shape, with border of soft papillae (nipplelike projections) and 4 chitinous jaws; size, 0.5 to 25 cm; examples of genera: Aphrodita (sea mouse), Halosydna (common scale worm), Arctonoe.Free-moving; prostomium with 1 to 5 antennae, 2 ...
nonflammable, volatile, liquid drug introduced into medicine in the 1950s and used as a general anesthetic. Halothane rapidly achieved acceptance and became the most frequently used of the potent anesthetics, despite its substantially higher cost than ether and chloroform and ... [1 Related Articles]
a sulfate mineral containing aluminum and iron [FeAl2(SO4)4·22H2O]. If more than 50 percent of the iron has been replaced by magnesium, the mineral is called pickeringite. These minerals are usually weathering products of sedimentary rocks that contain aluminum and metallic ...
(from the article "Anatolia") ...of the leaders of the coalition against Assyria in 853-records that he has built a throne and erected a monument for the Semitic goddess Bahalatis. Another contemporary of Shalmaneser III was Halpa-Runtiyas of Patina, whose name has also been found ...
(from the article "American literature") ...To Make My Bread (both 1932). Other notable proletarian novels included Jack Conroy's The Disinherited (1933), Robert Cantwell's The Land of Plenty (1934), and Albert Halper's Union Square (1933), The Foundry (1934), and The Chute (1937), as well as some ...
American poet whose unsentimental and psychologically complex free verse in Yiddish extols socialism, individual rights, and social justice. [1 Related Articles]
(from the article "nebula") ...newly formed atom is in an excited energy level and cascades from that level to a lower one with the emission of a line photon. One of the brightest lines in diffuse nebulae, for example, is the red Halpha line ...
(from the article "education") A laudable experiment in the field of vernacular education was carried out by Lieutenant Governor James Thomason in the North-Western Provinces. Thomason's halqabandi system attempted to bring primary education within easy reach of the common people. In ...
(from the article "education") ...Isfahan, Mashhad, Ghom, Damascus, Cairo, and the Alhambra (Granada), became centres of learning for students from all over the Muslim world. Each mosque usually contained several study circles (halqah), so named because the teacher was, as a rule, seated on ...
great 17th-century portraitist of the Dutch bourgeoisie of Haarlem, where he spent practically all his life. Hals evolved a technique that was close to Impressionism in its looseness, and he painted with increasing freedom as he grew older. The jovial ... [4 Related Articles]
U.S. naval commander who led vigorous campaigns in the Pacific theatre during World War II. He was a leading exponent of warfare using carrier-based aircraft and became known for his daring tactics. [2 Related Articles]
greatly abbreviated runic alphabet, found mainly in inscriptions dating from the 10th to the 12th century in the Halsingland region of Sweden. Probably developed near Lake Malar, the runes seem to be a simplification of the Swedish-Norwegian Rok runes and ...
landskap (province), east-central Sweden, in the southern part of Norrland region. It is bounded on the east by the Gulf of Bothnia, on the south by the landskap of Gastrikland, on the west by those of Dalarna and Harjedalen, and ...
(from the article "Siemens, Werner von") ...and invented improvements for it. A specialist on the electric telegraph, he laid an underground line for the Prussian army in 1847 and, at the same time, persuaded a young mechanic named Johann Georg Halske to start a telegraph factory ...
American pioneer of scientific surgery who established at Johns Hopkins University, Baltimore, the first surgical school in the United States. [3 Related Articles]
(from the article "Olympic Games") ...between American athletes and British officials. The 400-metre final was nullified by officials who disqualified the apparent winner, American John Carpenter, for deliberately impeding the path of Wyndham Halswelle of the United Kingdom. A new race was ordered, but the ...
(from the article "dipteran") Adult flies have only one pair of wings, on the mesothorax or second thoracic segment. The hind wings, modified into halteres, have a stalk and a knob, or club, that may be large and heavy relative to the size of ...
(from the article "oligotrich") ...mouth) ciliature. For many species an anterior spiralling band of membranelles (cilia fused into a flat plate) serves as an efficient, and in some cases the only, means of locomotion. The species Halteria grandinella is a common freshwater representative of ...
a Balto-Finnic domestic spirit who oversees the household and protects it from harm. The word haltia is derived from the Germanic haldiaz, originally from Gothic haldan referring to the ruler or master of a given area. [1 Related Articles]
highest mountain in Finland, at the extreme northwestern tip of Finnish Lapland on the Norwegian border, rising to 4,357 feet (1,328 m). The peak is located in Finland's only true mountain range, the Haltia (Halddia in Norway). [1 Related Articles]
(from the article "Turing machine") ...be read from the system once the machine has stopped. (However, in the case of Godel's undecidable propositions, the machine would never stop, and this became known as the "halting problem.")
unitary authority, geographic county of Cheshire, England. The unitary authority comprises Widnes and surrounding suburban areas, on the north shore of the River Mersey in the historic county of Lancashire, and Runcorn and its suburbs, on the south shore of ...
(from the article "Sundanese") ...and death ceremonies, conform closely to the Javanese pattern, though often mixed with elements of Hindu origin. The Sundanese language, like Javanese, has status styles: kasar (informal), halus (deferential), and panengah (a middle style).
any of several confections of Balkan and eastern Mediterranean origin, made with honey, flour, butter, and sesame seeds or semolina, pressed into loaf form or cut into squares. Halvah is made with a variety of colourings and flavourings. Its texture ... [1 Related Articles]
(from the article "rigging") ...and sails, such as jibs, are manipulated for trimming to the wind and for making or shortening sail are known as the running rigging. The running rigging is subdivided into the lifts, jeers, and halyards (haulyards), by which the sails ...
extinct genus of corals found as fossils in marine rocks from the Late Ordovician Period to the end of the Silurian Period (461 million to 416 million years ago). Halysites is also known as the chain coral from the manner ...
(from the article "Noah") ...first, the passage attributes the beginnings of agriculture, and in particular the cultivation of the vine, to Noah; second, it attempts to provide, in the persons of Noah's three sons, Shem, Ham, and Japheth, ancestors for three of the races ...
the rear leg of a hog prepared as food, either fresh or preserved through a curing process that involves salting, smoking, or drying. The two hams constitute about 18-20 percent of the weight of a pork carcass. In the United ...
town, upper valley of the Somme River, Somme departement, Picardie region, France, southwest of Saint-Quentin. Its medieval fortress, used for centuries as a state prison, was destroyed by German forces in 1917. Among the fortress' prisoners in ...
(from the article "Arabian Desert") ...plains are duricrusted (covered with a crust of soil formed by salts), having smooth, firm surfaces formed by the cementation of sandy debris at groundwater level. Typical of the stony plains is Al-Hamad, which stretches from Al-Nafud northward into the ...
Japanese ceramist who revitalized pottery making in Mashiko, where ceramic arts had flourished in ancient times. Hamada was designated a Living National Treasure by the Japanese government in 1955. [1 Related Articles]
city, west-central Iran, at the northeastern foot of Mount Alvand (11,716 feet [3,571 metres]), in Hamadan ostan (province). Itself at an elevation of 6,158 feet (1,877 metres), the city dominates the wide, fertile plain of the upper ... [3 Related Articles]
any of several handwoven floor coverings of considerable variety, made in the district surrounding the ancient city of Hamadan (Ecbatana) in western Iran and brought there for marketing. Several generations ago, many of these rugs were traded through Mosul and ...
(from the article "Lebanon") On October 1 an attempt to assassinate Marwan Hamade, the former minister of the economy, failed, although one of his guards was killed in the bomb blast. Hamade, a member of Druze leader Walid Jumblatt's parliamentary bloc, a week earlier ...
(from the article "Djibouti, history of") ...posture in external relations was reflected in its internal politics. Hassan Gouled Aptidon, an Issa Somali, was elected to two consecutive terms as president in 1981 and 1987. Barkat Gourad Hamadou, an Afar serving as prime minister since 1978, was ...
large, powerful monkey of the plains and open-rock areas of the Red Sea coast, both in Africa (Eritrea, The Sudan) and on the opposite coast in Yemen and Saudi Arabia. The hamadryas is the smallest baboon species, with a body ... [3 Related Articles]
(from the article "mezzotint") ...used, although in the 20th century the French artist Georges Rouault and the English printmaker Stanley William Hayter each made several plates. Its most distinguished mid-20th-century advocate, Yozo Hamaguchi, a Japanese artist living in Paris, developed techniques for printing colour ...
city, central Syria, on the banks of the Orontes River. It was an important prehistoric settlement, becoming the kingdom of Hamath under the Aramaeans in the 11th century BC. It fell under Assyrian control in the 9th century BC, later ... [5 Related Articles]
former city, Shizuoka ken (prefecture), Honshu, Japan, on the west bank of the Tenryu River, northeast of Hamamatsu. In 2005 it became part of Hamamatsu. Hamakita's cotton industry began in the late 19th century and grew to some 500 factories; ...
Finnish Nordic skier who was Finland's foremost female competitor in the sport. She captured three Olympic gold medals and a bronze at the 1984 Games in Sarajevo, Yugoslavia (now in Bosnia and Herzegovina). She won seven Olympic medals between 1984 ... [1 Related Articles]
